<div class="window">
  <span>充值卡兑换</span>
  <a href="###">查看账单</a>
</div>
<div class="fot">
  <input type="text" style="width: 450px; height: 50px;" placeholder="请输入充值卡兑换码进行充值">
  <button class="a">充值</button>
</div>
